function stripCharsInBag(s, bag) {
    var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++) {
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) {
            returnString += c;
        }
    }
    return returnString;
}

function daysInFebruary(year) {
    // February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}

function DaysArray(n) {
    for (var i = 1; i <= n; i++) {
        this[i] = 31
        if (i == 4 || i == 6 || i == 9 || i == 11) {
            this[i] = 30
        }
        if (i == 2) {
            this[i] = 29
        }
    }
    return this
}

function isInteger(s) {
    var i;
    for (i = 0; i < s.length; i++) {
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) {
            return false;
        }
    }
    // All characters are numbers.
    return true;
}

function isFutureDate(selectDate) {
    var selected = new Date(selectDate);
    var today = new Date();
    return (selected.getTime() > today.getTime()) ? true : false;
}

//check given element is empty and return true if empty else false
function isFieldEmpty(domElement) {
    with (domElement) {
        return (value == null || value.trim() == "") ? true : false;
    }
}

function isDate(dtStr) {
    // if (isFutureDate(dtStr)) {
    //     printMessage(errorText, errorCode);
    // } else {
    //date format validations
    var dtCh = "-";
    var minYear = 1900;
    var maxYear = 2100;
    var isValideDate = true;
    var daysInMonth = DaysArray(12);
    var pos1 = dtStr.indexOf(dtCh);
    var pos2 = dtStr.indexOf(dtCh, pos1 + 1);
    var strYear = dtStr.substring(0, pos1);
    var strMonth = dtStr.substring(pos1 + 1, pos2);
    var strDay = dtStr.substring(pos2 + 1);

    strYr = strYear
    if (strDay.charAt(0) == "0" && strDay.length > 1) {
        strDay = strDay.substring(1)
    }
    if (strMonth.charAt(0) == "0" && strMonth.length > 1) {
        strMonth = strMonth.substring(1)
    }
    for (var i = 1; i <= 3; i++) {
        if (strYr.charAt(0) == "0" && strYr.length > 1) {
            strYr = strYr.substring(1)
        }
    }

    month = parseInt(strMonth)
    day = parseInt(strDay)
    year = parseInt(strYr)

    // date format should be : yyyy-mm-dd
    if (pos1 == -1 || pos2 == -1) {
        isValideDate = false;
    }
    //enter a valid month
    if (strMonth.length < 1 || month < 1 || month > 12) {
        isValideDate = false;
    }
    //enter a valid day
    if (strDay.length < 1 || day < 1 || day > 31 || (month == 2 && day > daysInFebruary(year)) || day > daysInMonth[month]) {
        isValideDate = false;
    }
    //enter a valid 4 digit year between " + minYear + " and " + maxYear
    if (strYear.length != 4 || year == 0 || year < minYear || year > maxYear) {
        isValideDate = false;
    }
    //Please enter a valid date
    if (dtStr.indexOf(dtCh, pos2 + 1) != -1 || isInteger(stripCharsInBag(dtStr, dtCh)) == false) {
        isValideDate = false;
    }

    if (!isValideDate) {
        //todo error message
        return false;
    }
    //  }
    return true
}